Any tip about software to monitor if a web server is up and running on linux ? It should be able to run with not knowing anything more than the URL. And it must have functionality to send an email alert when the site goes down. Should not be hard to write a script for this myself but seems pointless if there is already something nice out there.
Note that I am going to monitor internal servers, so this need to be a tool that runs on my machine on the same network, not external web based services.
And note that small and simple solutions are preferred.
Update: I eventually created a small python script that I am currently using for this, it can be found here.